{
  "plugins": [
    "proposal-class-properties",
    "external-helpers",
    "syntax-flow",
    ["transform-parameters", { "loose": true } ],
    "transform-block-scoping",
    "transform-spread",
    "transform-classes",
    "transform-destructuring",
    "transform-arrow-functions",
    "transform-for-of"
  ]
}
